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See detailGender effect on the scapular 3D posture and kinematic in healthy subjects
Schwartz, Cédric ULg; Croisier, Jean-Louis ULg; Rigaux, Elise et al

in Clinical Physiology and Functional Imaging (in press)

Populations considered for shoulder analysis are often composed of various ratios of men and women. It is consequently hypothesized that gender has no significant effect on the joint kinematic. However ... [more ▼]

Populations considered for shoulder analysis are often composed of various ratios of men and women. It is consequently hypothesized that gender has no significant effect on the joint kinematic. However the literature reports, for the shoulder, differences in the range of motion between genders. The specific influence of gender on the scapula-thoracic kinematics has not been studied yet. The dominant shoulder of two populations of men and women composed of 11 subjects each were evaluated in three dimensions for three distinct motions: flexion in the sagittal plane, abduction in the frontal plane and gleno-humeral internal/external rotation with the arm abducted at 90°. Posture, kinematics and range of motion were studied separately. For flexion and abduction and with regard to the scapular kinematic, external rotation were significantly larger for women than men. The differences were of at least 5° at 120° of humeral elevation. Upward rotations were identical. Women also showed larger average active humero-thoracic range of motion. The mean differences were of 13°, 7°, 12° and 5° for abduction, flexion, internal rotation and external rotation, respectively. No difference was observed between the scapular resting positions of both populations. The observed differences concerning both the scapular and humeral patterns would indicate that the shoulder behavior of men and women should not be expected to be similar. [less ▲]

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See detailOne injection of platelet-rich plasma associated to a submaximal eccentric protocol to treat chronic jumper's knee
Kaux, Jean-François ULg; Croisier, Jean-Louis ULg; Bruyère, Olivier ULg et al

in The Journal of sports medicine and physical fitness (in press)

INTRODUCTION: Jumper's knee is a frequent chronic overuse syndrome of the upper part of the patellar tendon. Platelets contain lots of growth factors which could enhance the healing process of tendons ... [more ▼]

INTRODUCTION: Jumper's knee is a frequent chronic overuse syndrome of the upper part of the patellar tendon. Platelets contain lots of growth factors which could enhance the healing process of tendons. METHODS: Twenty patients with chronic upper patellar tendinopathy were enrolled. Assessments were made before infiltration of PRP, and 6 weeks and 3 months after the infiltration, using a 10--point Visual Analogic Scale, clinical examinations with a pressure algometer, algofunctional scores (IKDC and VISA--P), functional assessments (isokinetic and optojump evaluations) and imagery (ultrasounds and MRI). The PRP was obtained with an apheresis system (COM.TEC, Fresenius). Six millilitres of PRP were injected without local anaesthetic. One week after infiltration, patients started a standardised sub--maximal eccentric reeducation. RESULTS: Pain during daily activities significantly decreased with time. During functional evaluation, it decreased as well, but without significant functional improvement. No improvements in the imagery measurements were observed. Younger patients seemed to be more susceptible to have an improvement of pain by the PRP infiltration. CONCLUSION: This study demonstrates that a local infiltration of PRP associated with a submaximal eccentric protocol can improve symptoms of chronic jumper's knee in patients non--responsive to classical conservative treatments. [less ▲]

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See detailIsocinétisme et muscles rotateurs d'épaule
Forthomme, Bénédicte ULg; Crielaard, Jean-Michel ULg; Kaux, Jean-François ULg et al

in Innovations technologiques et préhension (2014, October)

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See detailAdaptation interculturelle et validation du questionnaire VISA-P en français
Oppong-Kyei, Julian; Bruyère, Olivier ULg; Delvaux, François ULg et al

in 7ème Congrès National SFMES & SFTS 2014 (2014, September)

Introduction La tendinopathie patellaire est une affection musculo-squelettique très fréquentes chez le sportif et la plus fréquente au niveau du genou. Elle affecte le plus souvent des disciplines qui ... [more ▼]

Introduction La tendinopathie patellaire est une affection musculo-squelettique très fréquentes chez le sportif et la plus fréquente au niveau du genou. Elle affecte le plus souvent des disciplines qui nécessitent soit des impulsions et des sauts soit un travail important du quadriceps. Le Victorian Institute of Sports Assessment–Patellar (VISA-P) est un questionnaire permettant d’évaluer les symptômes et leurs retentissements sur les activités physiques quotidiennes et sportives de la tendinopathie patellaire (Jumper’s knee). Comme la plus part des questionnaires de ce type, le VISA-P fut originalement développé pour des patients anglophones et n'est donc pas adapté à une population francophone. En conséquence, l'objectif de cette étude sera de traduire, adapter et valider une version française fiable du VISA-P et d'en évaluer ses propriétés psychométriques. Matériel et méthode La traduction et l’adaptation interculturelle du VISA-P ont été réalisées selon les recommandations internationales (Guidelines for the Process of Cross-Cultural Adaptation of Self-Report Measures). Ce processus s'est déroulé en 6 étapes : traductions initiales, synthèse des traductions, traduction de retour vers la langue d’origine, comité expert, test de la version pré-finale et approbation du comité expert. La version française finale obtenue fut ensuite l’objet d’une évaluation de certaines propriétés psychométriques telles que la fidélité test-retest, la cohérence interne, la validité de construit et les effets plancher et plafond. Nonante-deux sujets furent recruté au total afin de tester ces propriétés psychométriques. Trois groupes de sujets furent utilisés pour répondre conjointement aux VISA-P et à un questionnaire supplémentaire, le Medical Outcomes Survey Short Form 36 questionnaire (SF-36) pour la validité de construit : un groupe de sujets pathologiques principalement recrutés parmi les patients du Centre Hospitalier Universitaire de Liège (28), un groupe de sujets asymptomatiques (22) et un groupe de sportifs à risque recrutés dans divers clubs sportif (42). L'ensemble des participants ont été recrutés au sein de la province de Liège. Résultats Aucun sujet ne présenta de grosses difficultés à comprendre le questionnaire suite au test de la version pré-finale. Les différents membres du comité expert se montrèrent satisfait de la version finale et donnèrent donc leur approbation. La moyenne des scores obtenu est de 53 (± 17) pour le groupe pathologique, 99 (± 2) pour le groupe sain et 86 (± 14) pour le groupe à risque. Les corrélations entre le VISA-P et certaines mesures divergentes du SF-36 semblent donner des résultats faibles. Les coefficients de corrélation mesurés entre les scores du VISA-P et les items convergents du SF-36 paraissent être élevés. Aucun effet plancher ou plafond n'a pu être observer lors de l'évaluation des propriétés psychométriques du VISA-P dans le groupe pathologique. Conclusion La version française du VISA-P est donc être un questionnaire compréhensible, fiable et adapté aux patients francophones souffrant d'une tendinopathie patellaire supérieur. [less ▲]

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See detailAdaptation interculturelle et validation du questionnaire VISA-A en français
Oppong-Kyei, Julian; Bruyère, Olivier ULg; Delvaux, François ULg et al

in 7ème Congrès National SFMES & SFTS 2014 (2014, September)

Introduction La tendinopathie d’Achille, dont la discipline athlétique implique une grosse activité de course à pied, représente une source de douleurs et de handicap. Cette pathologie fait actuellement l ... [more ▼]

Introduction La tendinopathie d’Achille, dont la discipline athlétique implique une grosse activité de course à pied, représente une source de douleurs et de handicap. Cette pathologie fait actuellement l'objet de nouvelles découvertes sur le plan de la physiopathologie permettant l'exploration de nouvelles pistes thérapeutiques. Dans le cadre de telles études, des échelles d’évaluation sont utilisées afin d'évaluer des phénomènes subjectifs ou complexes tels la douleur, la qualité de vie, le handicap, etc. Elles sont généralement composées de plusieurs items dont la cotation est combinée en un score global ou des sous scores dimensionnels. La majorité des échelles algo-fonctionnelles sont développés dans des pays anglophones et sont par conséquence uniquement pertinents pour des sujets parlant l’anglais. Ceci est la cas pour le Victorian Institute of Sports Assessment–Achilles (VISA-A), un questionnaire développé dans le but d'évaluer la sévérité des symptômes de la tendinopathie achilléenne. L’intérêt de ce mémoire est donc de valider une version française fiable de ce questionnaire. Matériel et méthode La traduction et l’adaptation interculturelle du VISA-A ont été réalisées selon les recommandations internationales (Guidelines for the Process of Cross-Cultural Adaptation of Self-Report Measures). Ce processus s'est déroulé en 6 étapes : traductions initiales, synthèse des traductions, traduction de retour vers la langue d’origine, comité expert, test de la version pré-finale et approbation du comité expert. La version française finale obtenue fut ensuite l’objet d’une évaluation de certaines propriétés psychométriques telles que la fidélité test-retest, la cohérence interne, la validité de construit et les effets plancher et plafond. Pour ces évaluations, 116 sujets furent recruté et répartis en 3 groupes : un groupe de sujets pathologiques principalement recrutés parmi les patients du Centre Hospitalier Universitaire de Liège (31), un groupe de sujets asymptomatiques (22) et un groupe de sportifs à risque (63). Tous ces sujets durent également répondre à un questionnaire supplémentaire, le Medical Outcomes Survey Short Form 36 questionnaire (SF-36) pour la validité de construit. L'ensemble des participants ont été recrutés au sein de la province de Liège. Résultats Aucun sujets ne présenta de difficultés à comprendre le questionnaire suite au test de la version pré-finale. Les différents membres du comité expert se montrèrent satisfait de la version finale et donnèrent donc leur approbation. La moyenne des scores obtenus dans le groupe pathologique est de 59 (± 18), celle du groupe sain est de 99 (± 1) et celle du groupe à risque est de 94 (± 7). Aucun effet plancher ou plafond n'a pu être observer lors de l'évaluation des propriétés psychométriques du VISA-A (dans le groupe pathologique). Les corrélations entre le VISA-A et certaines mesures divergentes du SF-36 semblent être faibles. Les coefficients de corrélation mesurés entre les scores du VISA-A et les items convergents du SF-36 paraissent être élevé. Conclusion La version française du VISA-A est donc être un questionnaire compréhensible, fiable et adapté aux patients francophones souffrant d'une tendinopathie d'Achille. [less ▲]

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See detailInfluence of players' level on racket speed and ball accuracy in the tennis serve
Tubez, François ULg; Croisier, Jean-Louis ULg; Cordonnier, Caroline ULg et al

Conference (2014, July 06)

INTRODUCTION Serve in modern tennis game is an important offensive weapon for players (1-2). In kinematic analysis, serve is the most studied stroke of this game. The aim of our study was to compare the ... [more ▼]

INTRODUCTION Serve in modern tennis game is an important offensive weapon for players (1-2). In kinematic analysis, serve is the most studied stroke of this game. The aim of our study was to compare the performance of two specific populations: international players versus national players. In particular, racket speed at impact and accuracy of ball were assessed. METHODS A tennis court was reconstructed in a motion analysis laboratory. The position of the racket was evaluated in 3D at a frequency rate of 200 Hz. Tests were performed on 6 professional players (international level) and 9 non-professional players (national level). Each of them served 25 trials in direction of the “T” area of deuce diagonal. Two squares of 1m² and 2 m² respectively were delimited on the corner of the serve square. The instruction for both groups was to serve in the “T” area with the highest ball speed and minimal ball rotation (flat serve). RESULTS Although the forward speed of the racket at impact was identical between the two groups of players (International 36.35 ± 2.37 m/s and national 36.37 ± 2.90 m/s, p-value 0,991), the accuracy and consistency of serves on the target area is better for international players group (1m² area: International 33% ± 7% and national 14% ± 12%, p-value 0.0053; 2m² area (including 1m² area): International 71% ± 8% and national 54% ± 12%, p-value 0.0096; Out of zone: International 29% ± 8% and national 46% ± 12%, p-value 0.014). DISCUSSION High-velocity ball seems to be a key factor for serve performance (3). It is known that there is a relationship between racket speed and ball velocity (4). Both groups have high racket speed. However, international players serve with better accuracy and consistency than national players. We hypothesize that these differences are due to capacity of international players to adapt to a particular environment. Moreover, international players could give priority to consistency over velocity. We conclude that high-velocity serve is not a sufficient criterion to perform at international level; consistency and accuracy are two important factors to reach this level. [less ▲]

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See detailImportance of quantitative return-to-field criteria
Schwartz, Cédric ULg; Cordonnier, Caroline ULg; Lehance, Cédric ULg et al

Conference (2014, July 04)

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See detailFatigue index reproducibility in isokinetic testing
Paulus, Julien ULg; Croisier, Jean-Louis ULg; Bosquet, Laurent et al

in De Haan, Arnold; De Ruiter, Jo; Tsolakidis, Elias (Eds.) Book of abstracts (2014, July)

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See detailPlatelet-rich plasma to treat patellar tendinopathies: a 1 year follow-up.
Kaux, Jean-François ULg; Croisier, Jean-Louis ULg; Bruyère, Olivier ULg et al

in Clinical Chemistry & Laboratory Medicine (2014, June), 52(Special Suppl), 1285

Background: Jumper’s knee is a frequent chronic overuse syndrome of the upper part of the patellar tendon. Platelets contain lots of growth factors which could enhance the healing process of tendons ... [more ▼]

Background: Jumper’s knee is a frequent chronic overuse syndrome of the upper part of the patellar tendon. Platelets contain lots of growth factors which could enhance the healing process of tendons. Infiltration of Platelet Rich Plasma (PRP) may be considered as a recent therapeutic option for chronic tendinopathies. The aim of the current study is to evaluate the clinical status and the return to sports activities in patients with chronic upper patellar tendinopathies up to 1 year after 1 infiltration of PRP. Methods: Twenty patients with chronic upper patellar tendinopathy were enrolled. Assessments were made before infiltration of PRP, and 6 weeks and 3 months and 1 year after the infiltration, using a 10-point Visual Analogic Scale and algofunctional scores (IKDC and VISA-P). Moreover, they had to answer an information questionnaire concerning their life and sports activities. The PRP was obtained with an apheresis system (COM.TEC, Fresenius). Six millilitres of PRP were injected without local anaesthetic. One week after infiltration, patients started a standardised sub-maximal eccentric reeducation. Results: Pain during daily activities significantly decreased with time. VAS has significantly dropped, IKDC and VISA-P significantly improved over the follow-up of 1 year. Seventy percents of patients reported a favourable evolution with decrease of pain, 15% did never report any improvement and 15% were treated surgically. Seventy percents returned to sports activities, 64,3% without any pain, and 50% of them recovered the same sport level. Younger patients seemed to be more susceptible to have an improvement of pain by the PRP infiltration. Conclusions: This study demonstrates that a local infiltration of PRP associated with a submaximal eccentric protocol can improve, at 1 year, symptoms of chronic jumper’s knee in patients non-responsive to classical conservative treatments. [less ▲]

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See detailEccentric training improves tendon biomechanical properties: a rat model
Kaux, Jean-François ULg; Drion, Pierre ULg; Libertiaux, Vincent et al

in British Journal of Sports Medicine (2014, April), 48(7), 155

Background: Even if eccentric exercises appear favourable in primary prevention of tendons lesions and, especially, in secondary prevention after tendinopathy, the biomechanical changes to the tissue are ... [more ▼]

Background: Even if eccentric exercises appear favourable in primary prevention of tendons lesions and, especially, in secondary prevention after tendinopathy, the biomechanical changes to the tissue are not yet clear. Objective: We aimed to better define the biomechanical changes that affect healthy tendon after eccentric and concentric training. Design: Randomised controlled trial. Participants: Eighteen Sprague-Dawley rats of 2 months. Interventions: The six rats in the control group (U) were not subjected to physical exercise. The 12 remaining rats (6 in each group) ran on a treadmill set at a +15° incline for concentric training (C) or a -15° incline for eccentric training (E), at a speed of 17 m/min for 1 h, three times per week for 5 weeks. Main Outcome Measurements: The tricipital, patellar and Achilles tendons were subsequently removed to perform a traction test until rupture, and a histological analysis was performed. Results: There was a significant improvement in the rupture force of the patellar and tricipital tendons between the U and E groups. The tricipital tendons in the control group presented a significantly smaller cross-section than the E- and C-trained groups, but none between E and C groups. No significant difference was observed for the mechanical stress at rupture per surface unit between the three groups for all three tendons. However, a tendency towards improvement these values was observed between the trained and the U groups for the patellar tendon. Histological studies demonstrated the tendency of the development of a greater number of blood vessels and a larger quantity of collagen in the eccentric group. Conclusions: The mechanical properties of tendons in rats improve after specific training, especially following eccentric training. Our results partly explained how mechanical loading, especially in eccentric mode, could improve the tendon structure. [less ▲]

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See detailEccentric training for elbow hypermobility
Kaux, Jean-François ULg; Delvaux, François ULg; Forthomme, Bénédicte ULg et al

in British Journal of Sports Medicine (2014, April), 48(7), 154

Background: Patients with hypermobility suffer from joints problems and chronic pain is the most frequently reported symptom. Objective: Eccentric muscle strengthening could be very important to protect ... [more ▼]

Background: Patients with hypermobility suffer from joints problems and chronic pain is the most frequently reported symptom. Objective: Eccentric muscle strengthening could be very important to protect hypermobile joints. Design: Case report. Patient: A girl (16 y.o.) affected by an Ehler-Danlos syndrome presented pain in the right elbow and the right wrist after a season of tennis. Interventions: Her training consisted of wrist prono-supination and flexion-extension muscle group reinforcement and proprioceptive training. To protect the wrist against excessive load, the eccentric strengthening exercises of prono-supinator and flexor-extensor muscles of elbow and wrist were undertaken gradually, at increasing speeds within a limited range of motion in flexion and extension, on an isokinetic device after an evaluation. She was also given an orthesis restricting the joint range of motion of the wrist. Main outcome measurements: The evaluation was made by isokinetic evaluation, visual analog scale and MOS-SF36 questionnaire before and after training. Results: The patient rapidly noted a decrease in pain and an increase in the stability of her right arm even when playing tennis. Isokinetic evaluation objectified a significant improvement in maximal torque in flexion-extension muscles of the right elbow. She was also given individualized home exercises. Conclusions: The goal of this eccentric training is to avoid hypermobility by using the muscles as a protective brake in the control of joint positioning. Muscles can be reinforced in eccentric mode with starting position at the maximum length of these muscles when unstreched. The exercises can be carried out safely on an isokinetic device, at slow speed and limited range of joint motion to avoid risk of luxation. Thus, in this case report, the eccentric exercises using an isokinetic device were effective to safely reinforce the muscles as a protective brake for joint hypermobility and prevent pain during practicing tennis. [less ▲]

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See detailThe eccentric intervention for prevention: muscle and tendon aspects
Kaux, Jean-François ULg; Hody, Stéphanie ULg; Delvaux, François ULg et al

in European Journal of Sports Medicine (2014), 1(2), 37-46

The muscle-tendon pathologies remain very common in sport as well as to manual workers. An action of primary and secondary prevention is crucial if we are to prevent the occurrence of these pathologies ... [more ▼]

The muscle-tendon pathologies remain very common in sport as well as to manual workers. An action of primary and secondary prevention is crucial if we are to prevent the occurrence of these pathologies and prevent recurrence. The eccentric contractions marked by the removal of muscle insertions, gives them certain preventive and rehabilitative characteristics. It is now clearly shown that the eccentric work applied to the muscle-tendon complex, leads to progressive structural changes. These adaptations allow the muscles and tendons to better suit external stresses under which they are subjected and thereby reduce the lesion risk but also to prevent recurrence. Finally, it is also accepted that only the sub maximal eccentric exercise gradually increased helped protect (up to 1 year) of Delayed Onset Muscle Soreness in case of severe and unusual eccentric work. [less ▲]

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See detailRevue épidémiologique des blessures lors de la pratique du rugby à XV
Kaux, Jean-François ULg; Julia, Marc; Chupin, Marie et al

in Journal de Traumatologie du Sport (2014), 31(1), 49-53

Rugby is an increasingly popular sport. Full contact being a major characteristic of rugby, injuries are not uncommon. The incidence of injury in Rugby Union reaches 30–91 per 1,000 hours of game time ... [more ▼]

Rugby is an increasingly popular sport. Full contact being a major characteristic of rugby, injuries are not uncommon. The incidence of injury in Rugby Union reaches 30–91 per 1,000 hours of game time. This epidemiological review of injuries in rugby players reports their localization, nature, causes, moment of occurrence in matches and seasonal trends as well as the influence of the player’s position, field conditions, and duration of off time after injury. [less ▲]

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See detailLe traitement médical conservateur des tendinopathies du genou
Kaux, Jean-François ULg; BAUVIR, Philippe ULg; Croisier, Jean-Louis ULg et al

in Ortho-Rhumato (2014), 12(1), 31-34

Les traitements «passifs» des tendinopathies sont généralement utilisés de manière empirique pour combattre la douleur mais ne modifient pas la structure histologique du tendon. Par contre, le travail ... [more ▼]

Les traitements «passifs» des tendinopathies sont généralement utilisés de manière empirique pour combattre la douleur mais ne modifient pas la structure histologique du tendon. Par contre, le travail excentrique a pour but de contrecarrer une théorie étiopathogénique proposant une insuffisance de résistance du tendon exposé à des charges externes qui peuvent progressivement entrainer des lésions. Les résultats cliniques suite à cette prise en charge montrent souvent une évolution favorable des douleurs. Les ondes de choc extra-corporelles demeurent une option thérapeutique non-invasives et présentent peu de complications. De plus, elles sont employées avec succès pour traiter des tendinopathies chroniques rebelles aux traitements conservateurs classiques. Le plasma riche en plaquettes (PRP) est obtenu par centrifugation de sang autologue afin d’obtenir une grande concentration plaquettaire dépendant de la technique employée. Malgré la preuve de l’efficacité du PRP sur la régénération tissulaire en laboratoire, il existe actuellement peu de preuves cliniques tangibles concernant le traitement des tendinopathies chroniques. Enfin, d’autres nouvelles options thérapeutiques (patches de dérivés nitrés, infiltrations de polidocanol, d’acide hyaluronique et de cellules souches) sont également abordées. [less ▲]

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See detailDescription of a standardized rehabilitation program based on sub-maximal eccentric following a platelet-rich plasma infiltration for jumper’s knee.
Kaux, Jean-François ULg; Forthomme, Bénédicte ULg; NAMUROIS, Marie-Hélène ULg et al

in Muscles, Ligaments and Tendons Journal (2014), 4(1), 85-89

Introduction: Different series emphasized the necessity of rehabilitation program after infiltration of platelet-rich plasma (PRP) in case of tendinopathy. However, most of them describe only briefly the ... [more ▼]

Introduction: Different series emphasized the necessity of rehabilitation program after infiltration of platelet-rich plasma (PRP) in case of tendinopathy. However, most of them describe only briefly the reeducation protocol and these programs vary. Our aim was to extensively describe a specific standardized rehabilitation program. Methods: After a review of literature of post-PRP infiltration protocols, we had developed a standardized rehabilitation protocol. This protocol was evaluated by 30 subjects with chronic jumper’s knee who. A a standardised progressive sub-maximal eccentric program supervised by a physical therapist for 6 weeks was started 1 week post-infiltration. The patient benefited also from electromyostimulation, isometric strengthening and stretching of the quadriceps, cycloergometer and cryotherapy. After the supervised program, the patient had to make an auto-reeducation added to the reathletisation protocol for 6 more weeks which was followed by maintenance exercises up to 1 year. The assessments were made using a VAS, IKDC and VISA-P scores. Results: The VAS , IKDC and VISA-P scores decreased very significantly with time. The compliance to auto-reeducation was good. Conclusion: We proposed a simple and efficient protocol based on sub-maximal eccentric reeducation to add to PRP infiltrations in case of patellar tendinopathy. [less ▲]

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See detailIsocinétisme : aspects spécifiques chez le sportif
Croisier, Jean-Louis ULg; Kaux, Jean-François ULg; Crielaard, Jean-Michel ULg et al

in Kinésithérapie Scientifique (2014), 550

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See detailDominance effect on scapula 3-dimensional posture and kinematics in healthy male and female populations
Schwartz, Cédric ULg; Croisier, Jean-Louis ULg; Rigaux, Elise et al

in Journal of Shoulder and Elbow Surgery (2014), 23(0), 873-881

Background: The contralateral shoulder is often used as a reference when evaluating a pathological shoulder. However literature provides contradictory results regarding the symmetry of the scapular ... [more ▼]

Background: The contralateral shoulder is often used as a reference when evaluating a pathological shoulder. However literature provides contradictory results regarding the symmetry of the scapular pattern in a healthy population. We assume that several factors including the gender and the type of motion may influence the scapula bilateral symmetry. Method: The dominant and non dominant shoulders of two populations of men and women composed of 11 subjects each were evaluated for three distinct motions: flexion in the sagittal plane, abduction in the frontal plane and gleno-humeral internal/external rotation with the arm abducted at 90°. Posture, kinematic and range of motion were studied separately. Results: Asymmetries are observed for motions performed in the frontal and sagittal plane but not for the internal/external rotation with the arm abducted at 90°. Multiplane asymmetries are observed for the male population, whereas asymmetries for the female one are mainly uniplanar. For both men and women, the scapula has a larger upward rotation on the dominant side. For men, a larger posterior tilt is also observed. The asymmetries mainly originate in the scapula kinematic and not in its original posture. Discussion: Even if the asymmetries are not large in terms of amplitude (inferior to 5°), one should be aware of their existence and the influence of the composition of the studied population when using the contralateral shoulder as a reference. [less ▲]

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See detailRééducation raisonnée de l’épaule opérée et non opérée (4ème édition)
Forthomme, Bénédicte ULg

Book published by Frison-Roche (2014)

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See detailExperimental Study of the Human Ability to Deliberately Excite a Flexible Floor
Schwartz, Cédric ULg; Berger, Alexis; Bruls, Olivier ULg et al

in Zingoni, Alphose (Ed.) Proceedings of the 5th International Conference on Structural Engineering, Mechanics and Computation (2014)

Human-structure interactions are not completely understood yet. This paper presents an experimental study focusing on the interaction between a human and a flexible support, with a major aim to better ... [more ▼]

Human-structure interactions are not completely understood yet. This paper presents an experimental study focusing on the interaction between a human and a flexible support, with a major aim to better understand how the behavior of a human subject, bouncing on a flexible structure, adapts to the support motion. Exploratory experiments are undertaken with a 7m-span timber footbridge tested in the Human Motion Analysis Laboratory of the University of Liege. The movements of the coupled system composed of the subject and the footbridge are recorded by Motion Capture technology; the subject\textquoteright{}s 3-D body motion is defined by three important angles: ankle, knee and hip. The interaction between the subject and the footbridge is also quantified by means of force platform measurements. The experiments indicate an influence of the support amplitude and natural frequency on the phase shift between the oscillatory floor motion and the three angles characterizing the motion. [less ▲]

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